GBP Endpoint Learning

Learning GBP endpoints over vxlan-gbp tunnels

Change-Id: I1db9fda5a16802d9ad8b4efd4e475614f3b21502
Signed-off-by: Neale Ranns <neale.ranns@cisco.com>

1 files changed, 212 insertions, 0 deletions

diff --git a/src/plugins/gbp/gbp_itf.c b/src/plugins/gbp/gbp_itf.c
new file mode 100644
index 00000000000..39a1124bba2
--- /dev/null
+++ b/src/plugins/gbp/gbp_itf.c
@@ -0,0 +1,212 @@
+/*
+ * Copyright (c) 2018 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <plugins/gbp/gbp_itf.h>
+
+/**
+ * Attributes and configurations attached to interfaces by GBP
+ */
+typedef struct gbp_itf_t_
+{
+  /**
+   * Number of references to this interface
+   */
+  u32 gi_locks;
+
+  u32 gi_sw_if_index;
+  u32 gi_bd_index;
+
+  /**
+   * L2/L3 Features configured by each user
+   */
+  u32 *gi_l2_input_fbs;
+  u32 gi_l2_input_fb;
+  u32 *gi_l2_output_fbs;
+  u32 gi_l2_output_fb;
+} gbp_itf_t;
+
+static gbp_itf_t *gbp_itfs;
+
+static gbp_itf_t *
+gbp_itf_get (index_t gii)
+{
+  vec_validate (gbp_itfs, gii);
+
+  return (&gbp_itfs[gii]);
+}
+
+static index_t
+gbp_itf_get_itf (u32 sw_if_index)
+{
+  return (sw_if_index);
+}
+
+index_t
+gbp_itf_add_and_lock (u32 sw_if_index, u32 bd_index)
+{
+  gbp_itf_t *gi;
+
+  gi = gbp_itf_get (gbp_itf_get_itf (sw_if_index));
+
+  if (0 == gi->gi_locks)
+    {
+      gi->gi_sw_if_index = sw_if_index;
+      gi->gi_bd_index = bd_index;
+
+      if (~0 != gi->gi_bd_index)
+	set_int_l2_mode (vlib_get_main (), vnet_get_main (),
+			 MODE_L2_BRIDGE, sw_if_index, bd_index,
+			 L2_BD_PORT_TYPE_NORMAL, 0, 0);
+
+    }
+
+  gi->gi_locks++;
+
+  return (sw_if_index);
+}
+
+void
+gbp_itf_unlock (index_t gii)
+{
+  gbp_itf_t *gi;
+
+  gi = gbp_itf_get (gii);
+  ASSERT (gi->gi_locks > 0);
+  gi->gi_locks--;
+
+  if (0 == gi->gi_locks)
+    {
+      if (~0 != gi->gi_bd_index)
+	set_int_l2_mode (vlib_get_main (), vnet_get_main (), MODE_L3,
+			 gi->gi_sw_if_index, 0, L2_BD_PORT_TYPE_NORMAL, 0, 0);
+      vec_free (gi->gi_l2_input_fbs);
+      vec_free (gi->gi_l2_output_fbs);
+
+      memset (gi, 0, sizeof (*gi));
+    }
+}
+
+void
+gbp_itf_set_l2_input_feature (index_t gii,
+			      index_t useri, l2input_feat_masks_t feats)
+{
+  u32 diff_fb, new_fb, *fb, feat;
+  gbp_itf_t *gi;
+
+  gi = gbp_itf_get (gii);
+
+  if (gi->gi_bd_index == ~0)
+    return;
+
+  vec_validate (gi->gi_l2_input_fbs, useri);
+  gi->gi_l2_input_fbs[useri] = feats;
+
+  new_fb = 0;
+  vec_foreach (fb, gi->gi_l2_input_fbs)
+  {
+    new_fb |= *fb;
+  }
+
+  /* add new features */
+  diff_fb = (gi->gi_l2_input_fb ^ new_fb) & new_fb;
+
+  /* *INDENT-OFF* */
+  foreach_set_bit (feat, diff_fb,
+  ({
+    l2input_intf_bitmap_enable (gi->gi_sw_if_index, (1 << feat), 1);
+  }));
+  /* *INDENT-ON* */
+
+  /* remove unneeded features */
+  diff_fb = (gi->gi_l2_input_fb ^ new_fb) & gi->gi_l2_input_fb;
+
+  /* *INDENT-OFF* */
+  foreach_set_bit (feat, diff_fb,
+  ({
+    l2input_intf_bitmap_enable (gi->gi_sw_if_index, (1 << feat), 0);
+  }));
+  /* *INDENT-ON* */
+
+  gi->gi_l2_input_fb = new_fb;
+}
+
+void
+gbp_itf_set_l2_output_feature (index_t gii,
+			       index_t useri, l2output_feat_masks_t feats)
+{
+  u32 diff_fb, new_fb, *fb, feat;
+  gbp_itf_t *gi;
+
+  gi = gbp_itf_get (gii);
+
+  if (gi->gi_bd_index == ~0)
+    return;
+
+  vec_validate (gi->gi_l2_output_fbs, useri);
+  gi->gi_l2_output_fbs[useri] = feats;
+
+  new_fb = 0;
+  vec_foreach (fb, gi->gi_l2_output_fbs)
+  {
+    new_fb |= *fb;
+  }
+
+  /* add new features */
+  diff_fb = (gi->gi_l2_output_fb ^ new_fb) & new_fb;
+
+  /* *INDENT-OFF* */
+  foreach_set_bit (feat, diff_fb,
+  ({
+    l2output_intf_bitmap_enable (gi->gi_sw_if_index, (1 << feat), 1);
+  }));
+  /* *INDENT-ON* */
+
+  /* remove unneeded features */
+  diff_fb = (gi->gi_l2_output_fb ^ new_fb) & gi->gi_l2_output_fb;
+
+  /* *INDENT-OFF* */
+  foreach_set_bit (feat, diff_fb,
+  ({
+    l2output_intf_bitmap_enable (gi->gi_sw_if_index, (1 << feat), 0);
+  }));
+  /* *INDENT-ON* */
+
+  gi->gi_l2_output_fb = new_fb;
+}
+
+u8 *
+format_gbp_itf (u8 * s, va_list * args)
+{
+  index_t gii = va_arg (*args, index_t);
+  gbp_itf_t *gi;
+
+  gi = gbp_itf_get (gii);
+
+  s = format (s, "%U locks:%d input-feats:%U output-feats:%U",
+	      format_vnet_sw_if_index_name, vnet_get_main (),
+	      gi->gi_sw_if_index, gi->gi_locks, format_l2_input_features,
+	      gi->gi_l2_input_fb, format_l2_output_features,
+	      gi->gi_l2_output_fb);
+
+  return (s);
+}
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */